[aprssig] WinAPRS question
oh2kku at iki.fi
Fri Dec 30 22:04:31 CST 2005
John Mc Hugh wrote:
> I'm running WinAPRS 2.7.2 and I see a mobile station that has a small
> circle around it. What is that? Is it something he is putting out or do
> I have a setting wrong? Is it his PHGD?
He's using position ambiguity (two digits). It means that only the
degrees and whole minutes of the reported position are (presumed to be)
accurate, i.e. the actual location is somewhere inside a square one
nautical mile in south/north direction and a bit under one nm in
east/west direction. I guess the circle is winaprs's way of showing the
approximate area inside which the station should be.
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